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外文翻譯---信息系統(tǒng)開發(fā)和數(shù)據(jù)庫開發(fā)-其他專業(yè)(留存版)

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【正文】 ived from the operational rules, it will help social development activities that top priority will be sorting and development activities under the topdown view through an enterprisewide approach for the development of these activities. There are many types of planning matrix is available, their monalities are: ● locations features show business function in which the implementation of operational locations. ● unit functions which showed that business function or business unit responsible for implementation. ● Information System data entities to explain how each information system interact with each data entity (for example, whether or not each system in each entity have the data to create, retrieve, update and delete). ● support functions data in each functional entities in the data set for the acquisition, use, update and delete. ● Information System target indication for each information system to support business objectives. Figure 3 illustrate a possible functions data entities matrix. Such a matrix can be used for a variety of purposes, including the following three objectives: 1) identify gaps in the data entities to indicate the types of entities not use any function or functions which do not use any entity. 2) found that the loss of each functional entities involved in the inspection staff through the matrix to identify any possible loss of the entity. 3) The distinction between development activities if the priority to the top of a system development function for a highpriority (probably because it important anizational objectives related), then this area used by entities in the development of the database has a high priority. Hoffer, Gee and Valacich (2021) are the works of the matrix on how to use the planning and pletion of the Information Engineering The planning system more plete description. 2 database development process Based on information engineering information systems planning database is a source of development projects. These new database development projects is usually in order to meet the strategic needs of anizations, such as improving customer support, improve product and inventory management, or a more accurate sales forecast. However, many more database development project is the bottomup approach emerging, such as information system user needs specific information to plete their work, thus beginning a project request, and as other information systems experts found that anizations need to improve data management and begin new projects. Bottomup even in the circumstances, to set up an enterprise data model is also necessary to understand the existing database can provide the necessary data, otherwise, the new database, data entities and attributes can be added to the current data resources to the anization. Both the strategic needs or operational information needs of each database development projects normally concentrated in a database. Some projects only concentrated in the database definition, design and implementation of a database, as a followup to the basis of the development of information systems. However, in most cases, the database and associated information processing function as a plete information systems development project was part of the development. System Development Life Cycle Guide management information system development projects is the traditional process of system development life cycle (SDLC). System development life cycle is an anization of the database designers and programmers information system posed of the Panel of Experts detailed description, development, maintenance and replacement of the entire information system steps. This process is because Waterfall than for every step into the adjacent the next step, that is, the information system is a specification developed by a piece of land, every piece of the output is under an input. However shown in the figure, these steps are not purely linear, each of the steps overlap in time (and thus can manage parallel steps), but when the need to reconsider previous decisions, but also to roll back some steps ahead. (And therefore water can be put back in the waterfall!) Figure 4 on the system development life cycle and the purpose of each stage of the product can be delivered concise notes. The system development life cycle including each stage and database developmentrelated activities, therefore, the question of database management systems throughout the entire development process. In Figure 5 we repeat of the system development life cycle stage of the seven, and outlines the mon database at each stage of development activities. Please note that the systems development life cycle stages and database development steps 一一對應(yīng) exists between the relationship between the concept of modeling data in both systems development life cycle stages between. Enterprise Modeling Database development process from the enterprise modeling (system development life cycle stage of the project feasibility studies, and to choose a part), Organizations set the scope and general database content. Enterprise modeling in information systems planning and other activities, these activities determine which part of information systems need to change and strengthen the entire anization and outlines the scope of data. In this step, check the current database and information systems, development of the project as the main areas of the nature of the business, with a very general description of each term in the development of information systems when needed data. Each item only when it achieved the expected goals of anizations can be when the next step. Conceptual Data Modeling One has already begun on the Information System project, the concept of data modeling phase of the information systems needs of all the data.
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